| 摘要 |
Shut-off valve with a shut-off element (4; 4') which is provided with a hemispherical external surface and in which a through-running channel (20) is provided. The shut-off element is rotatable in a housing (2; 2') which comprises a number of channels. At the places where the channels open out into the interior space of the housing, an O-ring (32) is fitted around the opening of each channel, in a groove provided between the housing and the shut-off element. The interior space between the shut-off element and the housing is sealed off from the environment by a sealing ring (26) which is disposed between the essentially hemispherical sufaces of the housing and the shut-off element above the mouths of the channels in the housing and those of each channel in the shut-off element. The housing is provided on the outside with one or more radially outward projecting ribs (40; 62), around which radially inward projecting hook edge parts (38; 60) of the shut-off element or of a shut-off element retaining element (5) can grip, for the purpose of rotatably connecting the shut-off element and the housing, and for axially retaining the shut-off element in the housing. On the other hand, the housing and the shut-off element can be connected by a bayonet connection at the housing bottom. |
